I think it’s objectively going CCW because of the subtle perspective scaling… but after forcing myself to see it CW, I had to cover the face to stop my brain from ping-ponging back and forth with the face always facing me.

Personally mine switches directions whenever I’m looking in the top left or right corners and blink. This might help the people that have trouble seeing both directions but it’s different for everybody.

The best way to be able to see both directions is to understand that CW she is looking down and CCW she’s looking straight ahead. If you trace your eyes to where her head with be after the turn you can essentially watch in a figure 8 pattern

Because the projection is orthographic, your brain doesn’t get a depth cue telling you that the geometry is getting closer or farther away. The immediate rotational cue under this projection is ambiguous with regards to the direction of the rotation as well, as the speed with which each particle moves is identical whether it is in the front or the back. The left or right rotations, however, are not identical with respect to the pose of the figure, which makes the woman’s look as though her head tilts in the direction that she is rotating (as observed by you).